CN100359942C - Video conference system and its management method - Google Patents

Abstract

A video conferencing system and its management method, wherein the video conferencing system includes: a terminal; a multi-point control unit, which is the upper level of the terminal, and controls the subordinate terminals to which it belongs to conduct a video conference; a conference management system, which is the upper level of the multi-point control unit, It is used to manage the resource allocation of the subordinate multi-point control unit, and realize the conference scheduling and control of the local venue during the meeting; the conference coordination system is the superior of the conference management system, and coordinates the subordinate conference management system and the subordinate conference management system according to the scheduling request. The adjacent conference coordination system performs overall conference scheduling and control. Correspondingly, the management method of the video conferencing system includes: 1) the user requests the home conference management system to schedule a conference; 2) the home conference management system directly processes the local site to which it belongs according to the scheduling request, and delivers the cross-conference management system scheduling to the The affiliated conference coordination system; 3) The conference coordination system dispatches the corresponding master and slave conference management systems according to the scheduling request.

Description

Video conference system and its management method

technical field

The invention relates to a video conference, especially a video conference system and a management method thereof.

Background technique

In video conferencing, through the codec and transmission of video and audio data, participants can see/hear one party, multiple parties, or all participants. At present, the video conference system mainly adopts the ITU-T H.320 series standard narrowband conference video conference system and the H.323 series standard IP conference video conference system. Please refer to FIG. 1 , the video conferencing system mainly includes a multipoint control unit (MCU, Multipoint Control Unit) 1 and a terminal 2 . MCU 1 can control multiple terminals to participate in video conferencing, and all video and audio data must be processed by MCU 1 (sometimes codec is required). The number of terminals 2 participating in the conference, and MCU 1 is usually more expensive than terminal 2, which makes MCU 1 a rare resource in the video system, so a conference management system is required to schedule conferences and allocate MCU resources.

Traditional videoconferencing systems are basically oriented to the enterprise and private network markets. There are mainly two solutions for conference management systems, which are described in detail below.

In the first solution, the MCU equipment manufacturer provides a local conference management system 41 for managing the terminal 2 or a conference management system 42 embedded in the MCU 1, as shown in FIG. 2 . In this solution, each MCU 1 must be managed by a dedicated administrator, and the user requests the administrator to schedule a meeting via the network 3 by telephone, fax, or email, and the administrator schedules the conference in the video conference system according to the information requested by the user. corresponding meeting. If a cascaded conference is to be scheduled, the administrator must manually determine which terminals 2 hold a conference on which MCU 1, and manually generate a cascaded conference site.

The disadvantages of this solution are:

All conference management in this way has to be done manually, which is inefficient, and when there are many MCUs, the management is more difficult. It is generally used in small-scale enterprise video conferencing systems, which cannot meet the requirements of video operation.

For the second solution, when the number of MCU 1 is large, the centralized management method is generally used for conference management, as shown in Figure 3. That is, a dedicated conference management system 43 is used to manage multiple MCUs 1 in a unified manner. This kind of video conferencing system usually also provides a reservation interface, and users can directly schedule meetings through the reservation interface. The conference management system 43 automatically completes MCU 1 resource allocation and cascading .

Although this solution is more convenient for meeting management, it still can only use the MCU in this system to hold meetings. The construction of the video operation system is usually built on a regional basis. Even if a single operator can establish a unified national meeting management system, Centralized management is still impossible for cross-operator and even cross-border video services. On the one hand, this kind of independent video system will easily cause a shortage of MCU resources, and on the other hand, it will cause a huge waste of network bandwidth, because the video service is a service that consumes a lot of bandwidth. Suppose a user in Shenzhen wants to communicate with Beijing 10 users hold a 384kbps video conference. If the MCU in Shenzhen must be used for the meeting, the maximum bandwidth consumption between Shenzhen and Beijing can reach 10×384kbps. If the MCU in Beijing is used for the meeting, the maximum bandwidth between Shenzhen and Beijing will be Consumption is only 384kbps. Since the real-time requirements of the video service are very high, excessive bandwidth consumption will significantly degrade the service quality.

Although cascade conferences of multiple video systems can be held through manual scheduling or MCUs of other systems can be used to hold conferences, the entire process requires manual intervention due to the participation of administrators of each system, which obviously cannot meet the needs of public video operations.

Contents of the invention

The problem to be solved by the present invention is to provide a video conference system and its management method, which can schedule and control cross-conference management systems.

In order to solve the above problems, the video conferencing system of the present invention includes: a terminal; a multi-point control unit, as the upper level of the terminal, controls the subordinate terminal to conduct a video conference; a conference management system, as the upper level of the multi-point control unit, is used to manage the subordinate The resource allocation of the subordinate multi-point control unit is to meet the requirements of users, and realize the conference scheduling and control of the local venue during the conference; the conference coordination system, as the superior of the conference management system, is used to process the subordinate conference management system or adjacent The scheduling request of the conference coordination system, and according to the scheduling request, coordinate each subordinate conference management system and the adjacent conference coordination system for overall conference scheduling and control.

The conference coordination system includes: a system management module, which is used to complete the system configuration and operation management of the conference coordination system; a conference scheduling module, which is responsible for processing conference scheduling requests from the lower-level conference management system or adjacent conference coordination systems; conference control module, which is used to forward Conference control data; and a multi-point communication module, which is responsible for communicating with the subordinate conference management system and the adjacent conference coordination system.

The multipoint communication data in the multipoint communication module includes source node identification, channel identification, destination node list, upper layer application data and application data segment identification, and the conference coordination system is realized through the channel identification and destination node list in the multipoint communication data routing strategy.

The system configuration of the system management module includes: the terminal has a unified number; the conference management system determines the terminal to which it belongs by configuring the number segment; the conference coordination system is configured with the number segment managed by the affiliated conference management system and the number managed by the adjacent conference coordination system Section, in order to realize that the conference coordination system determines several conference management systems where the conference is held according to the system configuration in the video conference, splits the conference into sub-conferences, and sends the sub-conferences to the subordinate conference management systems. The conference coordination system dynamically determines the master conference management system and the slave conference management system according to the system configuration and scheduling strategy in the video conference.

Among the subordinate multi-point control units managed by the main conference management system, one of the multi-point control units is the main multi-point control unit, and the other multi-point control units in the main conference management system and the slave conference management system are slave multi-point control units. And the master conference management system completes the cascading between master and slave multi-point control units.

The scheduling policy of the conference coordination system refers to determining the main conference management system according to the number of terminals managed by the conference management system, and determining whether to merge the terminals in the sub-conferences into the main conference management system according to the number of sub-conferences.

Correspondingly, the management method of the videoconferencing system of the present invention includes the following steps:

1) The user requests the home conference management system to schedule a conference; 2) The home conference management system directly processes the local site according to the scheduling request, and delivers the cross-conference management system scheduling to the conference coordination system; 3) The conference coordination system according to The scheduling request schedules the corresponding master and slave conference management systems.

Step 3) also includes the following steps: 31) the conference coordination system determines the conference management system to which each terminal belongs; 32) the conference coordination system splits the video conference into sub-conferences, and distributes the sub-conferences to the corresponding conference management systems system; 33) The conference coordination system determines a master conference management system and several slave conference management systems.

Before step 1), the following system configuration is required: uniformly number the terminals in the video conferencing system; configure the number segment of the conference management system to determine the terminal to which it belongs; configure the conference coordination system with the number segment managed by the conference management system and the number segment managed by the adjacent conference coordination system, so that the conference coordination system can schedule according to the correspondingly managed number segment.

Steps 2) and 3) also include a step in which the conference coordination system schedules corresponding adjacent conference coordination systems.

After step 3), it also includes: 4) the master and slave conference management systems feed back the scheduling results to the affiliated conference coordination system; 5) the conference coordination system feeds back the final scheduling result to the affiliated conference management system that sent the scheduling request.

Compared with the prior art, the present invention has the following advantages:

Distributed multi-level conference management is adopted to realize network-wide and conference-wide scheduling, which can maximize the operator’s network configuration, improve equipment utilization, and reduce investment costs;

Realize automatic cascading, can hold large-scale video conferencing efficiently and quickly, without arranging special personnel for conference scheduling and control, and conveniently realize cross-operator and transnational system interconnection, so as to meet the requirements of public video operation;

By scheduling conferences based on terminal number partitions and thresholds, the utilization of MCU and network resources is more reasonable.

Description of drawings

Figure 1 is a basic schematic diagram of a video conferencing system.

FIG. 2 is a schematic diagram of a video conferencing system in the prior art.

FIG. 3 is a schematic diagram of another video conferencing system in the prior art.

FIG. 4 is a schematic diagram of the first solution of the videoconferencing system of the present invention.

FIG. 5 is a schematic diagram of the specific embodiment of FIG. 4 .

Fig. 6 is a block diagram of the conference coordination system in the video conference system of the present invention.

FIG. 7 is a schematic diagram of the communication model of the conference coordination system in the video conference system of the present invention.

FIG. 8 is a schematic diagram of a second solution of the videoconferencing system of the present invention.

FIG. 9 is a flow chart of the management method of the videoconferencing system of the present invention.

Detailed ways

On the basis of the existing centralized conference management system, the video conference system of the present invention adds a superior conference coordination system, integrates each independent video system into a unified video network, fully exerts the scale benefit of the network, and truly satisfies video operation demand.

The video conferencing system of the present invention is a tree-like distributed structure, including a multi-point control unit, a terminal, a conference management system and a conference coordination system, wherein:

Terminal means a network device capable of real-time two-way communication with a multi-point control unit or other terminals, such communication consisting of control, indication, voice, moving image, and/or data;

Multi-point control unit (MCU), as the upper level of the terminal, controls the subordinate terminal to carry out video conferencing;

The conference management system, as the upper level of the multi-point control unit, is used to manage the resource allocation of the subordinate multi-point control unit to meet the requirements of users, and realize the conference scheduling and management of the local venue (that is, each participating terminal) during the conference. control;

The conference coordination system, as the upper level of the conference management system, coordinates the subordinate conference management systems and adjacent conference coordination systems to carry out overall conference scheduling and control according to the scheduling request.

The relationship between conference system coordination and conference management system is a superior-subordinate relationship. Each conference coordination system can manage multiple conference management systems, and each conference management system only communicates with the conference coordination system that manages it. There is a peer-to-peer relationship between conference coordination systems, and both parties can request each other to schedule conferences.

Here, the scheduling request refers to the user's request to the home conference management system (that is, the conference management system where the conference caller's account is located) to schedule a conference, including the start time and duration of the conference, and the terminals participating in the conference.

The conference coordination system performs conference control through conference control data, and the conference control data includes conference status data and conference control commands. Among them, the conference status data means that during the holding process, each conference management system reports to the superior conference coordination system, and is forwarded by the conference coordination system to other conference management systems, including the opening/ending of the conference, the joining/leaving of the conference site or the chairman order card changes; conference control commands include extending/ending conference, calling/hanging up/adding/deleting/broadcasting/watching a site, and setting multiple screens. The conference coordination system forwards the conference status data and conference control commands to other participating conference management systems, and can record the original bill data for settlement and checking data between conference management systems.

Please refer to shown in Figure 4, in this embodiment, the conference coordination system is set independently, so the video system structure:

Terminal 2, a total of twelve;

MCU 1, six, as the superior of terminal 2, each MCU 1 manages two terminals 2;

The conference management system 44, 45, 46, as the superior of the MCU 1, manages two MCU 1 respectively;

The conference coordination systems 51 and 52 are the superiors of the conference management systems 44, 45 and 46, wherein the conference coordination system 51 is the superior of the conference management systems 44 and 45, and the conference coordination system 52 is the superior of the conference management system 46, and the conference coordination The systems 51 and 52 are adjacent conference coordination systems, which can be mutually scheduled.

In order for the conference coordination system to realize the overall conference scheduling and control of the subordinate conference management systems and adjacent conference coordination systems according to the scheduling request, conference control data and scheduling policy coordination, the unified system configuration of the entire video conference system, the conference coordination system It is necessary to determine the conference management system to which each terminal belongs. This embodiment adopts the mode similar to fixed-line telephone number to set, please refer to as shown in Figure 5:

The terminals in the video conferencing system have a unified number (such as using E.164 encoding). For example, twelve terminals are encoded as follows: and 01231004;

The conference management system determines the terminal it belongs to by configuring the number segment. In this embodiment, the number segment is used as the common prefix of the terminal codes. For example, the conference management system configured with the number segment 0755 and 020 can manage terminals whose number prefixes are 0755 and 020 , and the conference management system with configuration number segment 010 can manage terminals with serial number prefix 010, similarly the conference management system with configuration serial number 0123 can manage terminals with serial number prefix 0123;

The conference coordination system is configured with a number segment managed by its affiliated conference management system and a number segment managed by an adjacent conference coordination system. For example, the conference coordination system whose configuration number range is 0086755, 008620 and 008610 can manage the conference management system whose configuration number range is 0755, 020 and 010, so as to determine the terminal to which the corresponding conference management system belongs, that is, determine the terminal to which the unified numbering belongs. Conference management system; similarly, the conference coordination system whose configuration number is 001123 can manage the conference management system whose configuration number is 0123, so as to determine the terminal mentioned in the conference management system. Each other can mutually schedule the conference coordination system to carry out "neighborhood" designated configuration.

The conference coordination system determines several conference management systems where the conference will be held according to the system configuration (terminal number, number segment configuration, etc., each participating terminal is also called the venue) in the video conference, and splits the conference and sends it to the subordinates For each conference management system, the video conference held on each conference management system is a sub-conference of the video conference, and the master conference management system and the slave conference management system are dynamically determined according to the scheduling strategy. The following is a detailed description of the scheduling process of the conference coordination system:

First of all, the conference coordination system first determines the conference management system or conference coordination system to which each terminal belongs according to the number of each terminal, so as to determine which conference management system the conference will be held on, split the conference into multiple sub-conferences, and then report to each conference management system sends;

Secondly, the conference coordination system determines where the main conference management system is according to the corresponding strategy. For example, it can determine the main conference management system (that is, the conference management system where the main MCU is located) according to the number of terminals. The main conference management system will be described in detail later. ;

Finally, according to the appropriate scheduling strategy, whether to merge sub-conferences to reduce unnecessary cascading, such as setting a threshold, when the number of sites in a sub-conference is less than the threshold, the terminals in the sub-conference will be directly merged into the main conference management system. Here, the scheduling strategy of the conference coordination system refers to determining the main conference management system according to the number of terminals managed by the conference management system and determining whether to merge into the main conference management system according to the number of sub-conferences.

In addition, the master conference management system means that in a video conference, if the conference management system needs to be cascaded across conference management systems, the conference management system where the master MCU is located is the master conference management system; the slave conference management system means that in a video conference, If cascading across conference management systems is required, the conference management system that does not contain the master MCU is a slave conference management system. Among the subordinate multi-point control units managed by the main conference management system, one and only one multi-point control unit is the main multi-point control unit, and the other multi-point control units in the main conference management system and the slave conference management system are slave multi-point The control unit and the main conference management system complete the cascade connection between the master and slave multi-point control units. In addition, the cascade here refers to the master-slave cascade conference mode in the video conference, that is, a video conference is held on multiple MCUs, of which there is only one master MCU, and the others are slave MCUs. The master-slave MCUs directly pass through the communication link. Roads are connected as a whole.

During conference scheduling, after the conference management system receives the conference scheduling request data, it first independently processes the local conference site (the range of numbers under the jurisdiction of each conference management system can be configured by the conference coordination system and sent to each corresponding conference management system), If all are local conference sites, they can be scheduled directly locally without interacting with the conference coordination system;

If the conference contains sites that do not belong to the conference management system, the scheduling request is submitted to the conference coordination system for processing. The conference coordination system sends a sub-conference scheduling request to each corresponding conference management system or conference coordination system (see the scheduling process of the conference coordination system for details). After all sub-conferences are successfully scheduled, the main conference management system completes the master-slave MCU. cascade.

In the process of holding a conference across multiple conference management systems, since each conference management system can only manage and control the status of sub-conferences held in the conference management system, the conference status data and control commands must be routed through the conference coordination system. Complete the control of the overall conference, manage the resource allocation of the MCU, and ensure that the resources required for the conference meet user requirements. The conference management system realizes cross-system meetings by communicating with the conference coordination system. When the conference management system does not communicate with the conference coordination system, it is a centralized conference management system.

The conference coordination system specifically includes (see Figure 6):

System management module 61, used to complete the system configuration (such as numbering, number segment configuration) and operation management of the conference coordination system;

The conference scheduling module 62 is responsible for processing the conference scheduling request of the subordinate conference management system or the adjacent conference coordination system;

Conference control module 63, for forwarding conference control data; and

The multi-point communication module 64 is responsible for communicating with the subordinate conference management system and the adjacent conference coordination system.

Please refer to Figure 7. The communication model between the conference coordination system and the subordinate conference management system and between the conference coordination systems is based on the seven-layer communication model of the International Standards Organization (ISO). Serving ITU-T X.224, the upper layer of transport layer 71 is multipoint communication module 64, and the upper layer of multipoint communication module 64 is meeting management application layer 72 (as meeting scheduling module 62, meeting control module 63).

The multipoint communication data in the multipoint communication module 64 adopts the following format, but is not limited to this format to carry the upper layer data:

{

source node ID,

channel ID,

Destination node list,

Application data fragmentation flag,

upper layer application data,

...

}

The conference coordination system realizes the routing strategy through the channel identification and the destination node list in the multipoint communication data, improves the communication efficiency, and facilitates the modular design of the upper layer application. For example, channels 1 to 1000 can be used for conference scheduling request data transmission, and channels greater than 1000 can be used for conference control. The meeting scheduling request data can be directly sent to the meeting scheduling module 62 for processing. For conference control data (including status data and control commands), routing policies can be further set. For example, when the conference coordination system does not need the conference control function, the conference control data may not pass through the conference control module 63 of the conference coordination system. When the conference coordination system only needs billing, the conference control module 63 only sends information related to billing to the conference coordination system, such as conference opening/ending, meeting place entry/leaving, etc., when a certain conference management system does not need to perform conference control , it is not necessary to send conference control data to it. That is to say, the conference coordination system not only completes the cross-system scheduling of the conference, but also controls the conference as required.

The conference coordination system can be independent of the conference management system (see Figures 4 and 5), or embedded in the affiliated conference management system (see Figure 8).

Correspondingly, the management method of the video conferencing system includes:

1) The user requests the scheduling conference from the home conference management system;

2) The affiliated conference management system directly processes the affiliated local conference site according to the request, and delivers the scheduling across the conference management system to the affiliated conference coordination system;

3) The conference coordination system schedules the corresponding master and slave conference management systems according to the scheduling request, (the conference coordination system controls the conference according to the conference control data during the conference scheduling process, and schedules with reference to the scheduling strategy) specifically includes the following steps:

The conference coordination system determines the conference management system to which each terminal belongs;

The conference coordination system distributes the split sub-conferences of the video conference to the respective conference management systems;

The conference coordination system determines a master conference management system and several slave conference management systems;

4) The master and slave conference management systems feed back the scheduling results to their conference coordination systems;

5) The conference coordination system feeds back the final scheduling result to the home conference management system that sends the scheduling request.

If the scheduling request needs to schedule an adjacent conference coordination system, the corresponding adjacent conference coordination system is scheduled through the correspondingly managed number segment, and then the corresponding conference coordination system performs steps 3)-5);

Before scheduling the process, the following system configuration is also required:

1) Unified numbering of the terminals in the video conferencing system;

2) Determining the terminal to which the conference management system configuration number section belongs;

3) The conference coordination system is configured with the number segment managed by the affiliated conference management system and the number segment managed by the adjacent conference coordination system.

Conference coordination system in conference control data and scheduling strategy

Please refer to FIG. 9, which is a specific embodiment of the management method of the videoconferencing system. Adding cascaded sites across the conference management system includes the following steps:

(1) The user requests the scheduling conference from the home conference management system;

(2) judging whether the conference scheduling request is a cross-conference management system or a local request;

(3) According to the request, the affiliated conference management system will directly process the affiliated local conference site if the local request is requested, or deliver the scheduling across the conference management system to the affiliated conference coordination system;

(4) The conference coordination system schedules the corresponding master and slave conference management systems through the correspondingly managed number segment according to the scheduling request, conference control data and scheduling strategy;

(5) The master and slave conference management systems feed back the scheduling results to their affiliated conference coordination systems;

Firstly, the affiliated conference coordination system dispatches the main conference management system;

The main conference management system feeds back the scheduling results to the conference coordination system;

The coordination system schedules the conference management system according to the scheduling result;

Feedback the scheduling results from the conference management system to the conference coordination system;

The conference coordination system schedules the main conference management system to add cascading conference sites;

The main conference management system feeds back the cascading results to the conference coordination system;

(6) The conference coordination system feeds back the final scheduling result to the home conference management system that sends the scheduling request.

If the scheduling request needs to schedule the adjacent conference coordination system, the corresponding adjacent conference coordination system is scheduled through the corresponding managed number segment, and then the corresponding conference coordination system executes the corresponding scheduling process.

The process of adding a terminal or extending a conference during a conference is similar to adding cascaded sites across conference management systems, and will not be repeated here.

To sum up, compared with the prior art, the video conferencing system and its management method of the present invention adopt distributed multi-level conference management to realize the whole network and full conference scheduling, which can maximize the operator’s network configuration and improve the equipment Utilization rate, reduce investment cost; realize automatic cascading, can hold large-scale video conferencing efficiently and quickly, without arranging special personnel for conference scheduling and control, and conveniently realize cross-operator and transnational system interconnection, so as to meet the public operation of video conferencing Requirements; By scheduling conferences on terminal number partitions and thresholds, the utilization of MCU and network resources is more reasonable.

Claims (22)

1. video meeting system comprises:

Terminal;

Multipoint control unit, as the higher level of terminal, the subordinate's terminal under the control is carried out video conference;

Meeting management system, as the higher level of multipoint control unit, the resource allocation of the subordinate's multipoint control unit under being used to manage to satisfy customer requirements, is held conference dispatching and the control that realizes local meeting-place in the process in meeting;

It is characterized in that this video meeting system also comprises:

The conference coordination system, higher level as meeting management system, be used to handle the dispatch request of subordinate's meeting management system or adjacent conference coordination system, and each subordinate's meeting management system under coordinating according to dispatch request and adjacent conference coordination system carry out whole conference dispatching and control.

2. video meeting system as claimed in claim 1 is characterized in that, the conference coordination system comprises:

System management module is used to finish the system configuration and the operational management of conference coordination system;

The conference dispatching module be responsible for to be handled the conference dispatching request of subordinate's meeting management system or adjacent conference coordination system;

The meeting control module is used to transmit the meeting control data; And

The multi-point communication module, be responsible for and subordinate's meeting management system and adjacent conference coordination system between communication.

3. video meeting system as claimed in claim 2, it is characterized in that, between conference coordination system and the subordinate's meeting management system and the communication model between the conference coordination system based on seven layers of communication model of International Standards Organization, the transmission service ITU-T that transport layer is following to adopt International Telecommunications Union is X.224.

4. video meeting system as claimed in claim 3, it is characterized in that, multi-point communication data in the multi-point communication module comprise source node sign, gap marker, destination node tabulation, upper layer application data and application data segmentation marker, and the conference coordination system realizes routing policy by gap marker in the multi-point communication data and destination node tabulation.

5. video meeting system as claimed in claim 2 is characterized in that, the system configuration of this system management module comprises: terminal has unified numbering; Terminal under meeting management system is determined by the config. number section; Number section that the conference coordination system configuration has number section that affiliated meeting management system manages and adjacent conference coordination system to be managed, to realize that the conference coordination system holds the some meeting management systems in place according to system configuration decision meeting in video conference, and meeting is split as son conference, and each meeting management system of subordinate under described son conference sent to.

6. video meeting system as claimed in claim 5 is characterized in that, the conference coordination system dynamically determines that according to system configuration and scheduling strategy main meeting management system reaches from meeting management system in video conference.

7. video meeting system as claimed in claim 6, it is characterized in that, in subordinate's multipoint control unit that main meeting management system is managed, one of them multipoint control unit is main multipoint control unit, other main meeting management systems and the multipoint control unit from meeting management system are from multipoint control unit, and main meeting management system is finished the cascade between master and slave multipoint control unit.

8. video meeting system as claimed in claim 6, it is characterized in that, the scheduling strategy of conference coordination system refers to determine main meeting management system according to the quantity of meeting management system institute office terminal, and determines whether the terminal in the son conference is merged in the main meeting management system according to the quantity of son conference.

9. video meeting system as claimed in claim 2 is characterized in that, the meeting control data comprises conference status data and meeting control command.

10. video meeting system as claimed in claim 9, it is characterized in that, the conference status data refer in the process of holding a meeting, report to higher level's conference coordination system by each meeting management system, and, comprise the affiliation/defection or the variation of chairman's token in the holding/finishes of meeting, meeting-place by the data that the conference coordination system forwards is given other meeting management systems.

11. video meeting system as claimed in claim 9 is characterized in that, the meeting control command comprises prolongation/closing session, calling/hang up/add/delete/broadcast/watch the meeting-place, many pictures is set.

12. video meeting system as claimed in claim 1 is characterized in that, dispatch request refers to the meeting management system request scheduling meeting of user to conference convening person number of the account place, comprises time started, the duration of meeting and the terminal that participates in a conference.

13. video meeting system as claimed in claim 1 is characterized in that, in the meeting management system under the conference coordination system is embedded in.

14. the management method of a video meeting system is characterized in that, this method may further comprise the steps:

1) user is to the meeting of ownership meeting management system request scheduling;

2) this ownership meeting management system is directly handled affiliated local meeting-place according to dispatch request, and the scheduling that will stride meeting management system consigns to affiliated conference coordination system;

3) corresponding master and slave meeting management system is dispatched according to dispatch request by the conference coordination system.

15. the management method of video meeting system as claimed in claim 14 is characterized in that, step 3) is further comprising the steps of:

31) the conference coordination system determines the meeting management system that each terminal is affiliated;

32) the conference coordination system is split as son conference with video conference, and described son conference is distributed to each affiliated meeting management system;

33) the conference coordination system determines a main meeting management system and some from meeting management system.

16. the management method as claim 14 or 15 described video meeting systems is characterized in that, before step 1), also needs following system configuration:

Terminal in the video meeting system is unified numbering;

Meeting management system config. number section is determined affiliated terminal;

Number section that has number section that affiliated meeting management system manages and adjacent conference coordination system to be managed to the conference coordination system configuration is so that the conference coordination system dispatches according to number section of corresponding management.

17. the management method of video meeting system as claimed in claim 14 is characterized in that step 2), 3) between also comprise the step of the corresponding adjacent conference coordination of conference coordination system call system.

18. the management method of video meeting system as claimed in claim 14 is characterized in that, also comprises after the step 3):

4) the conference coordination system under master and slave meeting management system feeds back to scheduling result;

5) the conference coordination system feeds back to final scheduling result the ownership meeting management system that sends dispatch request.

19. the management method of video meeting system as claimed in claim 14 is characterized in that, the meeting management system at ownership meeting management system person's number of the account place that refers to the conference convening.

20. the management method of video meeting system as claimed in claim 14, it is characterized in that, the conference coordination system is in the conference dispatching process, carry out meeting control according to the meeting control data, the meeting control data comprises conference status data and meeting control command, wherein the conference status data refer to hold in the process in meeting, report to higher level's conference coordination system by each meeting management system, and, comprise the affiliation/defection or the variation of chairman's token in the holding/finishes of meeting, meeting-place by the data that the conference coordination system forwards is given other meeting management systems; The meeting control command comprises prolongation/closing session, calling/hang up/add/delete/broadcast/watch the meeting-place, many pictures is set.

21. the management method of video meeting system as claimed in claim 14, it is characterized in that, conference coordination system reference scheduling strategy carries out conference dispatching, scheduling strategy refers to determine main meeting management system according to the quantity of meeting management system institute office terminal, and determines whether the terminal in the son conference is merged in the main meeting management system according to the quantity of son conference.

22. the management method of video meeting system as claimed in claim 14 is characterized in that, dispatch request refers to the meeting management system request scheduling meeting of user to conference convening person number of the account place, comprises time started, the duration of meeting and the terminal that participates in a conference.

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